Malicious PDF — malware analysis report

Static analysis result for SHA-256 04179235837bbfb1…

MALICIOUS

PDF

49.5 KB Created: 2020-09-03 07:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d422d82773ec7fa105f7863bcee88e6f SHA-1: 085b3563fc5d079dc424ec794c2cd5968bb2047e SHA-256: 04179235837bbfb1fe2742a3c9dc4412dd4e1fd25f7edcbc578c920ad127f2ec
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.club/pify?keyword=sum+of+arithmetic+series+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/f103bb_bc87f40825f44cd29b268897cc9cbe38.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/717a42_1a9ec4a7d6bb49e8a291d7bd9153f64b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10b11f_dfadb288de5f4bb99d444573da87ca55.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d002d_5368b5e2cd5c4d118992892fa063990c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37428b_91d28381d0c342338467a0f5fad04a86.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/40b9e6_6375daeb0037476a86e63781b8114f57.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fe83c3_3174ebf1d0374f43b4f14e5888849f77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d26cb12c52a44130914d4c5577b4c534.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4a001_d0c334f79c084cb1aef3146dede4646e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bdc04d_a4342929997a4adc9dd851e31c176f02.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/53301968125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/65824958616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1007/6322/files/situs_film_bioskop_indonesia_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/zolomibotin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/new_balance_cricket_shirt_size_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 5464 bytes
SHA-256: 3ba0a314a0cefde177d5f0686e3a69066bc48d7cbfae3be75983b82ad95936f3
font_01_sfnt_off000074d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D1 15004 bytes
SHA-256: 92da04edb4cc8ae4e3a54fed4a1e8a90a2342fa5c96c9cb4c53b0496e1755c29
font_02_sfnt_off0000a443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA443 16112 bytes
SHA-256: 22c893bc42ecaeb904aaac3d5ada421132ba8fc2c9b49979be0583173b3f3d41

Open this report in the interactive analyzer, or submit your own file for analysis.