Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee76f2ce952285ab…

MALICIOUS

PDF

43.2 KB Created: 2020-08-11 22:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ceb48406b56d981950afb0924ef80cb SHA-1: 5fb55e6295fc59af684483892e53c2d3cde41848 SHA-256: ee76f2ce952285abccf054f2a24902a97c92b82337e3fbcc0803e724cb7edf9e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=bsc+nursing+4th+year+syllabus+pdf+ruhs'. This URL is presented within the document body, disguised as a syllabus, indicating a phishing or social engineering lure. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector.

Heuristics 3

  • 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.
  • 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=bsc+nursing+4th+year+syllabus+pdf+ruhs
    • http://files.zohabharwani.com/uploads/1/3/1/0/131070362/bacbd0.pdf
    • http://xalusoruk.dominiquejo.com/uploads/1/3/1/4/131454065/maparudaxi-vozapu-mudogamorufamof.pdf
    • http://sajuko.friendlylightcaralucia.com/uploads/1/3/1/6/131606227/1592394.pdf
    • http://rasojo.balasmontessorischool.com/uploads/1/3/1/6/131636725/6550369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/57569166593.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/jasowutika.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/adverbs_of_degree.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/random_ship_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/functional_skills_maths_level_1_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/don_t_forget_the_lyrics_game.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/titoxamob.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/how_to_use_getline_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/if_else_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/banking_awareness_september_2020.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_off00006a19.bin
1f8acf9724048661b567f7192ade4eab8f5f2372fe632bfc69f52c5266efc484
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A19 5796 bytes
font_01_sfnt_off00007dd6.bin
49d6a14184fb3b94a50382c43476ede6949d1406f768914d36ac35476e8f49b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 9996 bytes