PDF malware analysis — malicious · 64b18ee9284d489d

MALICIOUS

PDF

42.8 KB Created: 2020-09-01 05:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8f9a1f907d6761f9bac30f566a69a971 SHA-1: 821a9e130383520e486def5f5a1c764e58c01592 SHA-256: 64b18ee9284d489df7efb0ebdd61ea0a7fd95d8affb99e9f5e3b34b222abcd67

274 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=littlefield+technologies+report'. The embedded script and the nature of the redirector suggest an attempt to deliver a second-stage payload or conduct a phishing operation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.cc/wix?keyword=littlefield+technologies+report
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/3385/4103/files/suleloba.pdf
- https://cdn.shopify.com/s/files/1/0434/7274/8710/files/10961c_automating_administration_with_windows_powershell.pdf
- https://cdn.shopify.com/s/files/1/0430/8893/7120/files/39339557823.pdf
- https://cdn.shopify.com/s/files/1/0430/7589/5450/files/18004149616.pdf
- https://cdn.shopify.com/s/files/1/0431/8566/8259/files/63853117327.pdf
- https://static.usrfiles.com/ugd/850f07_c047caa4796e4baa8062e2696b1e05af.pdf
- https://static.usrfiles.com/ugd/ca32a8_8fa9bd3f98024678ae1ab137723a854c.pdf
- https://static.usrfiles.com/ugd/dc98cc_3400378e174c40f5ab528b45e402a4b4.pdf
- https://static.usrfiles.com/ugd/764aaa_a2eddce38ab04e0ca1287b52f6dc4fc4.pdf
- https://static.usrfiles.com/ugd/b972d5_d0bf75c3c9c74950b46e82036d844eab.pdf
- https://cdn.shopify.com/s/files/1/0431/8271/9136/files/ct_trang_bng_nitro.pdf
- https://cdn.shopify.com/s/files/1/0432/7155/3188/files/business_english_accounting_vocabulary.pdf
- https://cdn.shopify.com/s/files/1/0432/6077/2516/files/left_handed_calligraphy_practice_sheets.pdf
- https://cdn.shopify.com/s/files/1/0440/0090/3318/files/15210732203.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- https://cdn.shopify.com/s/files/1/0430/8893/7
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00005434.bin` `a83661e660b71ddd2bce3672b77405d7241663db7b350936af7ca6a899c3c173`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x5434	43863 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`font_00_sfnt_off00006885.bin` `5f6daaa83d786d6ce17232147fb79a2fe2bec76329bcc63965f93fc17321894c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6885	5148 bytes
`font_01_sfnt_off00007a0d.bin` `0e4d4be0264de3a4aa602364687d9b585645df6b7ae09117c5aedc78e313762b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A0D	10588 bytes

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