Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e19750bd8303f80…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 23:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c91a4a02f65f443246f177bca5e43d SHA-1: c68038db7051829e764403bffa25a30994b0d13e SHA-256: 4e19750bd8303f80620142a72654558c77bcd3d9fd6218108c9315b6e7c3cda9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though garbled, contains text related to 'network cabling installation guide pdf' and the malicious URL, suggesting a lure to a malicious site.

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=network+cabling+installation+guide+pdf
    • http://files.greenriverhoa.com/uploads/1/3/1/8/131872178/dezoteg.pdf
    • http://files.adamrehberg.com/uploads/1/3/0/8/130874567/3654186.pdf
    • http://files.cottonwoodcroft.com/uploads/1/3/0/8/130873718/d4eac7df77d64f5.pdf
    • http://files.cedarcreektheatre.org/uploads/1/3/0/7/130739654/0beb5e1.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/pedialyte_nutrition_label.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/latizirixagiloregozel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/84924754053.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/baby_s_day_out_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/zixaloguwojit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/82251652432.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/ritilegivevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/how_to_make_a_shovel_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/zunatotebizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/xutadunupunavupofewiputu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/gemewixovozosojifose.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/keditekakozadipafixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/74915001389.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c9.bin
9086b2a6f6cf853116a926f3d1a42fe70a052851c40ffb23a79d1d98f3e16031
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C9 5588 bytes
font_01_sfnt_off00007aed.bin
53cec7f5815b18932154ed8de1f3ed81651157d25de0c2040f3d3a14af2056af
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AED 10220 bytes