Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22801690b81fd72…

MALICIOUS

PDF

37.2 KB Created: 2020-08-22 09:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b7ca4ea58190c727d5868cb6cf9ea63 SHA-1: 0365bf896e2c357cbec7c7d1a89827d82bf2cc8c SHA-256: a22801690b81fd723073510cb23e2f2bf04776e55b34d01a4e24fe791711c5f3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as an educational report. The document body, though heavily obfuscated, contains the target URL and references to educational content, reinforcing the lure. The presence of numerous external PDF links, many pointing to unknown domains, suggests a link farm designed to distribute malicious content or engage in SEO poisoning.

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=illinois+state+board+of+education+report+card
    • http://jafagi.themysticgrounds.com/uploads/1/3/0/8/130814017/remoninimixuzid.pdf
    • http://dujafata.guqintables.com/uploads/1/3/0/8/130874565/viguwok_wavisup.pdf
    • http://dukewajo.shannonsstudio.com/uploads/1/3/2/6/132683292/9128695.pdf
    • http://files.navigatingla.com/uploads/1/3/1/4/131438759/dipilutilib.pdf
    • http://tulugojup.ethosspirit.com/uploads/1/3/2/6/132683188/6226013.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7455/files/94340515689.pdf
    • https://cdn.shopify.com/s/files/1/0434/8457/7958/files/ignition_system_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/nikki_carburetor_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/nomenclatura_das_amidas.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/74026241750.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/folilezitijur.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/71544739969.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/make_a_look_scanned.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/ap_anganwadi_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/xararogav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3386/files/tufipat.pdf
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/the_ansi_c_programming_language_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/dufizere.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000471c.bin
20d396ff06bcf076e43fb9835b74e582303a6a0109bed0c7153b5110c123642e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x471C 5108 bytes
font_01_sfnt_off00005870.bin
22a2317e5b531e2c15e55327c971c1400e701602a7f066cd21ca3588db6fcbfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5870 9668 bytes
font_02_sfnt_off00007989.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.