Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f6a07365051682…

MALICIOUS

PDF

54.2 KB Created: 2020-08-08 12:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 874af1a4b776e8109741484307d332c4 SHA-1: cc7503506f0b81c1927a916eeaafd12fc742bb8e SHA-256: 07f6a073650516821f556954102dd144156367a8f08b78d3f20853fb5094b869
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirectors or potentially malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Walter lewin lectures pdf', suggesting a phishing or scam attempt. The presence of numerous external links, including those to potentially malicious infrastructure, indicates an attempt to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=walter+lewin+lectures+pdf
    • http://gakizuze.bliss-out.co/uploads/1/3/0/7/130739625/7382517.pdf
    • http://files.churchwithoutwalls.com.au/uploads/1/3/1/4/131453897/3822c595fc7.pdf
    • http://files.dandelionkisscustomphotojewelry.com/uploads/1/3/0/8/130815311/sejesup_lekuxemil_defame_sapimil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/lulodamekugojakajurumow.pdf
    • https://cdn.shopify.com/s/files/1/0438/9083/5624/files/bododekugiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/z390_aorus_master_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/canonization_poem_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/68930856160.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/zomakikupazedogaliwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/secondary_metabolites_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/medafazamilexivakej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/29733736078.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/luwevodizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/76892365792.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/sapamovev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/modle_attestation_d_hbergement_pour_visa_tudiant.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_off000086d7.bin
615b0caeeeda252ccf3e2ee4aed93047a6b25bdda084cd9eeea7173284345ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 4000 bytes
font_01_sfnt_off000094e4.bin
1e1106035ddcb073918ec02adc1361bcf0056e9e766151bd7f4f4e5c96f55d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E4 5252 bytes
font_02_sfnt_off0000a6ea.bin
a2690f1d1a757f5ded1263a018436c0fa76d17bf602e3d401d76203bfab69293		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EA 10936 bytes

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