Malicious PDF — malware analysis report

Static analysis result for SHA-256 142a38c4dfec8124…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 21:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecf0cb9c2e2957969f95b190aa6f7cbb SHA-1: fc061a2e0af1ba8e7fc7d860ec67f02130007495 SHA-256: 142a38c4dfec81242fee6ba4630d69fe87e9c639f68377915500aa0360b0ecf4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into engaging with a fraudulent scheme. The presence of a malicious redirector URL indicates an attempt to lead the user to malicious infrastructure.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=understanding+the+linux+kernel+bovet+pdf
    • http://files.globemarineservices.com/uploads/1/3/1/1/131164236/kazemetipovegemolep.pdf
    • http://files.amypurcellart.net/uploads/1/3/1/8/131856602/pulekanuxaxosiw.pdf
    • http://files.lvccpp.com/uploads/1/3/0/7/130738615/rugaromosivu-sapiraki-bavosesoje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6896/4505/files/25539751656.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/mopowolejumop.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/lolesolemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/puvenixijosekorujelobod.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/gusaneruruzor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/4237041376.pdf
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/comcast_xfinity_channel_lineup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4935/files/certificate_of_origin_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/72896251341.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/vubizumawesafopodupazex.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/dopugakebakax.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/refevodizazudaxuwulepe.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_off00005e05.bin
1662b36a55308820f9c1d2d3b613bcf1dd8bc448a56b7f49b247aabb0e81ae7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 5624 bytes
font_01_sfnt_off00007129.bin
bc3c38bbd74d82e22ab9bf1c5f30cc55020a3d855359491b3b2c3aebd5b020c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7129 10040 bytes

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