Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6a21bd8afe1ac2…

MALICIOUS

PDF

38.4 KB Created: 2020-09-02 10:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9883aadd857cce8cd62bd1be885b5bc8 SHA-1: 1f7afc7be8e6f2879dec846141d09ebd5bd92896 SHA-256: 7e6a21bd8afe1ac225c77946615d992043443c08835e42e1838847dbfb97e3fe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as a piano sheet music PDF. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a malicious intent.

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.me/wix?keyword=goodbye+stranger+piano+sheet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/99555405742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/39871599892.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/makalah_perkawinan_beda_agama_menurut_hukum_islam.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/dedigubuxeruronetopizi.pdf
    • https://cdn.shopify.com/s/files/1/0450/3588/0598/files/al_ghazali_books.pdf
    • https://cdn.shopify.com/s/files/1/0461/4841/9747/files/20668687436.pdf
    • https://cdn.shopify.com/s/files/1/0437/8958/2487/files/best_flight_tracker_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/6449/1161/files/76111252805.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/antenna_theory_by_balanis_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/85652675039.pdf
    • https://static.usrfiles.com/ugd/9cb927_d34c24bac615424d914a718ef005f076.pdf
    • https://static.usrfiles.com/ugd/b28561_dfefd70c083e4beca68388f370d697df.pdf
    • https://static.usrfiles.com/ugd/89c6ad_95f704f34e0c4b4b9a0afbabfe7cf802.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_d385ce8e57f045c28bca0959d05346c5.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_off0000490b.bin
60d8d2380e56a7e510d28daf8f440f1b2c303a6c99c53901eeb1a150a258fd98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x490B 5332 bytes
font_01_sfnt_off00005b2c.bin
1f4585c2bba98ee91d2a2d2488528a1cadac548c842ba72d603ad03b9445dc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2C 10320 bytes
font_02_sfnt_off00007e7e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7E 4324 bytes

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