Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9c5d3d9c27da1c…

MALICIOUS

PDF

44.5 KB Created: 2020-08-21 09:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99307f42a5288fc193372d1f2551142b SHA-1: 2132629cff4c88ac218e3020a35324ac7373e740 SHA-256: 0d9c5d3d9c27da1c6bb802bd3bc599612ffa51d1097dbcb9625813536535a1f8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for Google Play Store apps. The presence of numerous links and the redirector strongly suggest a link farm or phishing campaign designed 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.ru/pify?keyword=google+play+store+apps++2018
    • http://pejazadug.womenintrousers.org/uploads/1/3/1/4/131453133/6351557.pdf
    • http://files.dowdystaxidermy.com/uploads/1/3/1/6/131606321/masomoxez.pdf
    • http://files.lhschoral.org/uploads/1/3/1/4/131409508/sofunenita.pdf
    • http://pawuki.robbaughman.com/uploads/1/3/1/3/131383388/ximiwawiwedorad_zokiretam_dubopotafazu_jowepuketuka.pdf
    • http://nojazeba.timberridgeeqcenter.com/uploads/1/3/2/7/132740478/385349.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/20843104391.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/when_things_fall_apart_pema.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/46807481871.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/singh_is_bling_movie_songs_ming.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/14745105516.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/36845913826.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/guwuji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/failed_to_login_invalid_session_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0446/0252/3812/files/physical_science_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/nezorizok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/burrows_casebook_on_contract_law.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/rotary_lift_manuals.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_off00006ce9.bin
4e187b836bdf2725f6696bd017611ba965aae071881dec3f3bde44a71dfe3cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE9 5640 bytes
font_01_sfnt_off0000803f.bin
06b03cbff4f4442c0da6852ca78408943cced193b944e549a6ee0bd8d8a47c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803F 10788 bytes

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