Malicious PDF — malware analysis report

Static analysis result for SHA-256 777c58e9bc832d33…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 13:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a792ec5ba597e244e22282f02ee4737 SHA-1: a7b34f91fba190b1fc715cfb5ffa11e00cb40898 SHA-256: 777c58e9bc832d3343cee47b2d11882d54c786bb73be2e9f5c0c7da6a1014b4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to an 'employment insurance quebec report', suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content.

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=employment+insurance+quebec+report
    • http://files.marphk.com/uploads/1/3/1/3/131380000/wowaxuzabakudokaxud.pdf
    • http://files.crazycraftcubby.com/uploads/1/3/0/8/130874025/404435fe8460.pdf
    • http://zuwulo.transformationalbodyworkniagara.com/uploads/1/3/1/3/131383837/pekub_robifibuwaw_sodarigisazoto_lekoxixejegavol.pdf
    • http://files.fionasenton.co.nz/uploads/1/3/0/7/130740211/e035ea37ecf3b01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7051/1521/files/acupressure_points_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/41._82327_12._41336.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/53992489017.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/breathing_exercises_to_increase_lung_capacity.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/76248760445.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/cecelib_possessive_series.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/free_barcode_generator_software_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/51225087454.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/hour_of_code_lightbot_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/zukodorudeveburam.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_off000064a9.bin
0f858f43b66a5c8ba8f4a8dd1602a1a414933f74bffa189d78b6a210d19277e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5404 bytes
font_01_sfnt_off000076fe.bin
2d7586a9f62c014c9511f4d62067a7123c5bcab3deb7642f3d6765c20b02b12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FE 9840 bytes

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