Malicious PDF — malware analysis report

Static analysis result for SHA-256 3545dbe645a1bd25…

MALICIOUS

PDF

43.7 KB Created: 2020-10-04 09:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74acf34c37f4cddd2dd685386005bd03 SHA-1: 36b3fdbcd8148bab688985b5de3c2dcda94765d8 SHA-256: 3545dbe645a1bd253516049ddf70740fa8584ddf884a8ecb14c86ba0bb5f153a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to lure users to malicious infrastructure. The embedded URL points to a redirector that likely leads to further malicious content or phishing pages. The document body itself is heavily obfuscated but contains the malicious URL.

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.ru/pify?keyword=energy+%2526+environmental+science+if In PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/kazeganonibowiwu.pdfIn PDF document text
    • https://site-1040576.mozfiles.com/files/1040576/wowurulebijupakadefumomen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9670/5691/files/angle_of_attack_indicator_garmin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2939/1516/files/medical_technologist_exam_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2178/1150/files/world_after_susan_ee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5347/6759/files/nc_license_plate_renewal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/regulation_foosball_table_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/pings_san_rafael.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0785/5773/files/xopedobegalamap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0750/3259/files/45169507824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/plato_republic_book_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/vanoponuxukeruvamogelasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8602/4356/files/dvd_wall_shelf_unit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3399/7724/files/3006057995.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 4488 bytes
SHA-256: 8debf092ce635fe3ecd1c7124242124cfd3c81c96150991fc54bb89006677650
font_01_sfnt_off00008069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8069 10040 bytes
SHA-256: 8f9ebe712320a6a2cf5493093a2b672e0d3deff76637723b57e01ecdb3b0b56b

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