Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbcab5e49ca9261…

MALICIOUS

PDF

52.6 KB Created: 2020-08-11 13:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db92b5282656256a9ad338eaee2e5a2b SHA-1: d9f721311fa001ede54317d4c0da4c42fb39f542 SHA-256: cbbcab5e49ca92617fdf956855c1ba7d474c7d9afb07293d5c97127cc88f4f00
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and heuristics indicate it contains a large number of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=libro+aura+soma+pdf, which is likely used to redirect the user to a malicious site. The presence of numerous links suggests a phishing or scam attempt.

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.cc/pify?keyword=libro+aura+soma+pdf
    • http://files.calzadoleonsr.net/uploads/1/3/1/3/131384679/xerut_xovup_riranazotuluvu_pedalikewif.pdf
    • http://files.beyondablonde.com/uploads/1/3/1/4/131483830/3123945.pdf
    • http://files.jwesleyfoundation.com/uploads/1/3/1/4/131406412/gurewonisutej.pdf
    • http://vuworob.jeroenkoevoets.com/uploads/1/3/1/3/131383483/654fbc4f28cf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/18111093028.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/encyclopdie_catholique_tho.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/neon_genesis_evangelion_n64.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/tejimawaxabavimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/best_biology_books_for_college.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/7247203891.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/paris_agreement_on_climate_change.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/48378769648.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/dodge_journey_rt_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/94489346127.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1449/files/40236877799.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/
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/neon_genes

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753f.bin
0f2227f26a11e0c30fc060d8d693e6b154bb68e14380ce1132f37c0bc1aba0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 5236 bytes
font_01_sfnt_off000086df.bin
928583c1651d695d66a8856e3be5e74bdcd54dee1f525834bc3679f6344fa2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 8660 bytes
font_02_sfnt_off00009f18.bin
6a56dc5dcde7d02552f7df80d2bfbaf5c57bdd7d7ecee34bfb4e5b4b0ba64976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F18 10604 bytes

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