Malicious PDF — malware analysis report

Static analysis result for SHA-256 70924569c8f504cb…

MALICIOUS

PDF

53.8 KB Created: 2020-08-07 23:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ddcc6b92118debdb1cea6bc5de6455e SHA-1: fb94524c2b996c989159732515fa72e794604fa6 SHA-256: 70924569c8f504cb39cebb5e222a0ccd894b70dbae0cfe3af2a431527451142e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a link farm designed for SEO manipulation, with one critical link identified as a redirector to malicious infrastructure. The presence of a 'download button' heuristic further supports a lure-based attack. The primary malicious URL identified is https://ttraff.com/pify?keyword=small+bakery+business+plan+sample+pdf, which likely serves as the initial point of compromise.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=small+bakery+business+plan+sample+pdf
    • http://files.bxsci83yearbook.org/uploads/1/3/2/3/132303150/gurevep_nivogotipa_pubum.pdf
    • http://tadefobef.phelpsmastergardeners.org/uploads/1/3/2/6/132682076/3191576.pdf
    • http://files.counsellingandyouthwork.com/uploads/1/3/1/1/131164442/3925456.pdf
    • http://files.charmsandsparklebyria.com/uploads/1/3/0/8/130814855/vadoremuneminubis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/82958775779.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/wefikab.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/kurez.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/lusizopapatovoxisige.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/xatasevemakemadadax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/87944406906.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/35711989856.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/80411353357.pdf
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/37154616354.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/danidafamomumawaliz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/butixefiderumapifeji.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/54632342082.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c8.bin
f84d66c1e1fe91ac86dc045ba776c2a4bd2bf3866de8bc2a65e9ccac8a944bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 5596 bytes
font_01_sfnt_off000086b2.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B2 1800 bytes
font_02_sfnt_off00008f40.bin
09afdba9341bf8b4c91d5d356ac51c778e28caaf3b0fb859ded500ea0e532f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F40 10488 bytes
font_03_sfnt_off0000b333.bin
71fe66e8a900eabe62c773f6b9b467243c87e6d484dd0ea34a22194082714177		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB333 16660 bytes

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