Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6a2f41315124dd…

MALICIOUS

PDF

45.0 KB Created: 2020-08-25 05:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e08e2b34a56e608e0decde466e9573 SHA-1: a298fc3135704f71962021a3f342ae4a677b7779 SHA-256: 6c6a2f41315124ddc32debe82bcc3ce1ccdc6787455e0461931bd5a352483d25
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a mass of external links, masquerading as a feeding guide, with one link identified as a malicious redirector. The document body itself is heavily obfuscated but contains the URL to the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=feeding+guide+for+infants
    • http://files.stmarksdurango.com/uploads/1/3/0/7/130740249/ruzuwagefawi-fumadup.pdf
    • http://files.agroecologyhub.info/uploads/1/3/1/3/131383661/247a2482a6a.pdf
    • http://fubivare.skateteamindy.com/uploads/1/3/2/3/132303093/f6d1d9cb9afd4be.pdf
    • http://vobub.newmexicolegalhelp.com/uploads/1/3/1/4/131438729/79f568b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/3198/1220/files/26301207994.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94393320092.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/payphone_maroon_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/ns_to_ms.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/sistema_bethesda_para_informar_citologia_cervical_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/xatubikivozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/4122768349.pdf
    • https://cdn.shopify.com/s/files/1/0435/6151/7217/files/15067208951.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/26275343212.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/brainteaser_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/wifi_password_mac_address_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/windows_7_iso_direct_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/zosuxideferirixupujaxaf.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073fb.bin
aba9ec4b569ed5a05e3684cfafb9d8d99b81c0fcb1622449c893c4bc22205568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FB 5000 bytes
font_01_sfnt_off00008504.bin
be525963c00411aad4fdf58ba2163b7ba18f2855732df3df366851a5100055d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 9992 bytes

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