Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a394faa830c0ec…

MALICIOUS

PDF

43.4 KB Created: 2020-08-10 21:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 098620dfa9666c0301fae06af6f38536 SHA-1: 54a4c2f871100b1b919c607fd74e8ac7bc946ee6 SHA-256: 79a394faa830c0ecfb2ff62b512326606556a81390a3cb21bac28dfb81d978d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.com/pify?keyword=carbono+anomerico+pdf', is identified as a malicious redirector. This indicates the document's purpose is to lure users to malicious infrastructure.

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.com/pify?keyword=carbono+anomerico+pdf
    • http://files.divinedishcatering.com/uploads/1/3/2/6/132681992/vasefojim-zilojaj-nunifuzi-davuzaxaxagat.pdf
    • http://tetip.norforkschools.org/uploads/1/3/0/8/130814328/mawosulinuw.pdf
    • http://gosujanu.laurenmmcollins.com/uploads/1/3/1/6/131607600/tokuxafaker.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/tuwujegutifokutamavole.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/mastering_metrics_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/4646/0830/files/31411576126.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/verizon_kyocera_flip_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/9207/7731/files/best_bible_study_topics.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/gaketifisugej.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/19th_amendment_to_the_constitution_sri_lanka_sinhala.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/gatuberumesidafetezoxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/gosobamasofavexuxejumike.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/pinged_me_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9590/0828/files/battlefront_ii_inferno_squad.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_off00006cc1.bin
01659b21fd901ed455c5702316dc1069be0145eab26d98be2f7869ddd0d18bca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 5136 bytes
font_01_sfnt_off00007e1a.bin
24219dd1ea22bc95d5271147ea480b85bb42f6e529021d12c1563f87216190e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 10320 bytes