Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef6ad01adb86ba7…

MALICIOUS

PDF

40.2 KB Created: 2020-08-09 11:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5765c27202a3806806fe32fbf83b0284 SHA-1: 8d296c555db9ac0b35682778b50efffd193b6137 SHA-256: 5ef6ad01adb86ba7377f850be40180fc45f5ac8d2677fad656d64ea499f1e38c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=anandi+vastu+calendar+2020+pdf+download'. This suggests a phishing or scam attempt, likely using the calendar theme as a lure. The ML classifier also strongly indicated maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

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.cc/pify?keyword=anandi+vastu+calendar+2020+pdf+download
    • http://files.nickhaymedia.com/uploads/1/3/0/9/130969768/dimabir-vaxabi-lasojulad.pdf
    • http://periku.martinegabisondesign.com/uploads/1/3/1/6/131637257/44860.pdf
    • http://files.seworiginal.org/uploads/1/3/0/8/130813042/marifireda_murilupiso.pdf
    • http://files.purplecowquilting.com/uploads/1/3/0/8/130814902/4676421.pdf
    • http://files.gaylereicheltart.com/uploads/1/3/0/7/130776728/459dc873.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/41743139422.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/20735259675.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/22026400834.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/fafuwevikokojavudu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/marcy_pro_weights_bench.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/riwuzidarawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/52434544425.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/mumofejirapojasufatibo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1315/0632/files/complete_physics_for_cambridge_secondary_1_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/lizakalaxa.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_off00005d0b.bin
efb1a193407bbb17b8b3e918e30764783aa866b6c4b3902c65ba4608595359ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0B 5564 bytes
font_01_sfnt_off0000701d.bin
389551b1fc077fd7ed793b50d92719833352eb6056235c28db2521d149df3bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 10440 bytes

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