Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d8cb9ec177555f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-23 18:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6cafa3180ca0d2a978d4d70a0af7ac SHA-1: ad3f80f516e769544adfc69508296723b184d2cb SHA-256: 14d8cb9ec177555f4139499028e7db22159937405861f03a5eb1ef6795ede561
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=add+badge+to+bottom+navigation+android', suggesting a lure related to Android development to entice clicks. No scripts were extracted, but the presence of malicious redirectors and a link farm strongly suggests a phishing or scam 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=add+badge+to+bottom+navigation+android
    • http://files.jamesjordanfoundation.com/uploads/1/3/0/9/130969334/4ea4b9c0.pdf
    • http://files.j-6forge.com/uploads/1/3/1/3/131398140/julevefikexinikiku.pdf
    • http://tubolokul.gllm.org/uploads/1/3/0/7/130775565/7df403abc8cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/bulbul_song_asomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/nemetovogorikuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/guwebiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/78485839120.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/63440189083.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/smart_converter_to_word_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/adjective_adverb_and_noun_clauses_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/96381745900.pdf
    • https://cdn.shopify.com/s/files/1/0431/8786/3715/files/english_japanese_medical_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0454/6166/7992/files/57545679049.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/14806271022.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/lexesipizerupekujobo.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_off00005e5d.bin
c64e14f03a1fd0b1eceb9928a94189aa45ac8462bfc4ddea4e8c17bcf6d229a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5D 5124 bytes
font_01_sfnt_off00006fbb.bin
19d461b176bb3ba49409d01e4266fcee9b2252ceabfc1765e678d7971c4659a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBB 10052 bytes

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