Malicious PDF — malware analysis report

Static analysis result for SHA-256 1036a236a2c8bada…

MALICIOUS

PDF

48.7 KB Created: 2020-08-05 03:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956e231ac999a9247acf37de1eb8f10d SHA-1: a56f818f9d3477a752bb899f6bc40f3851deaf71 SHA-256: 1036a236a2c8bada3333c7fe067417f241962b0f8d13ee104222df7a788a7c05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the URL https://ttraff.ru/pify?keyword=bonjour+tristesse+english+translation+pdf suggests a lure, possibly related to search engine optimization or redirecting users 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=bonjour+tristesse+english+translation+pdf
    • http://files.dogloverspetservicesut.com/uploads/1/3/0/8/130814706/9798833.pdf
    • http://files.bluelotushypno.com/uploads/1/3/2/6/132696063/ruwilelidexekoke.pdf
    • http://files.paraglidinginkorea.com/uploads/1/3/1/0/131070498/raxazexebogug.pdf
    • http://files.regencyparkcary.com/uploads/1/3/1/4/131454270/8102637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/unmount_sd_card.pdf
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/beyond_compare_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/books_should_be_free_kodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/82866010461.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/warhammer_40k_space_wolves_codex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/nevakagikivekipekurugaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/17994120959.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/25983040691.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/90467025154.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/naruto_shippuden_episode_77_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/gafezuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3853/9927/files/22297222293.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007172.bin
e9910cd61f8208180b1047e2c633fdd34350590f67e70a1df6129f1a4e13e26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5308 bytes
font_01_sfnt_off0000837c.bin
0a8fc41dba098162bb347a21f423b21431e6d32b338a493880a67664997ccd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 10504 bytes
font_02_sfnt_off0000a71f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71F 4324 bytes

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