Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c92f60b184573e4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 20:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 174aafac53f4487fa91058c76beefa1d SHA-1: 711f79f2288204514eeef608dca834cf27ce4b09 SHA-256: 8c92f60b184573e49f58974f65d7433cbb8ec555f7af9c1bd4fd689b8f7a04ff
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=bluetooth+barcode+scanner+android+tablet, which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious sites, likely for SEO spam or phishing campaigns.

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=bluetooth+barcode+scanner+android+tablet
    • http://files.juliedanho.com/uploads/1/3/1/3/131381605/xifosolij_ralajijojazan_zabano_gobamubakesav.pdf
    • http://files.authorkathrynperez.com/uploads/1/3/0/7/130776786/38ff62608b7d.pdf
    • http://mesolog.bgflowermart.com/uploads/1/3/0/9/130969153/7e17bffc9cd5.pdf
    • http://files.hoveyeyres.com/uploads/1/3/1/1/131164132/fujugovul.pdf
    • http://files.fbcbrockton.org/uploads/1/3/2/6/132681992/godoragakowito_papamerasu_kepilabubi_xatedagenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/xuxeluruvifixano.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/taxipugolejukob.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/12490186881.pdf
    • https://cdn.shopify.com/s/files/1/0449/4403/1899/files/chowka_kannada_hd_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/beer_lambert_law_equation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/xilaxitur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/55821875043.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/nexogodimagasulew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/zesizimuziwafukanigelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/zulunidifuwutotalulori.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_off000070de.bin
777014efa954c5790c82f90f4733bfbda432bea207531ae00eef5418f39fb029
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DE 5216 bytes
font_01_sfnt_off0000828a.bin
ce15a08b2d8879576d0b85f9d85cb7c2c336bb5e3212c9e2b96b3824074fb84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 10284 bytes