Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb4d6d00edff020…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 03:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1888bb34898b11b18ec62e68a47aa25e SHA-1: de706fa999d48fb3ca8707b79d4cd77dcd456d79 SHA-256: dfb4d6d00edff02057855d9b9e3bfffb940f3e4c7c5482ad8410ab80f4a912ec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=blanching+adalah+pdf. The document body, though partially obfuscated, contains text related to 'blanching adalah pdf' and references wkhtmltopdf, suggesting a lure document. The presence of a large number of external links points towards a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=blanching+adalah+pdf
    • http://files.keganphotography.com/uploads/1/3/1/4/131454436/lixepud.pdf
    • http://files.whatnotservices.com/uploads/1/3/1/8/131857305/ruvuk.pdf
    • http://files.victoriouslivingbiblestudy.com/uploads/1/3/2/6/132680789/6274598.pdf
    • http://files.dragonflyhempworx.com/uploads/1/3/2/6/132696117/5086331.pdf
    • https://cdn.shopify.com/s/files/1/0436/1004/6621/files/custom_mouse_pointers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/nudigavesosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/29021772500.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/gadatuziguzalajajimeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/51936317042.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/65031904335.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/69956226965.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/bazazejuxemixubikulik.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/manual_for_ear_training_and_sight_singing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50833930904.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/41942485273.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/1237270622.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/45168682508.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006657.bin
a73d5c878bbc85c27a531f1ca68548ed0187804abd6dafe4bbb88d8a14dd57cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 5192 bytes
font_01_sfnt_off00007807.bin
10ef4a23727eebefc5b15381ba8505a3300f91c03d53d186f0d6b8776e7f95c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7807 10208 bytes

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