Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bd2fda0d29e23b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 12:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6823f0551459f35a31bfaf5fb28bc12 SHA-1: 3f567724680defb6109cba3b796b2b9dceb4b9de SHA-256: 89bd2fda0d29e23b9fe263f55047f480536ac66c5a75b141de090080c0af2195
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. The document body, though obfuscated, contains the title 'Factors contributing to effective communication pdf', reinforcing the lure.

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=factors+contributing+to+effective+communication+pdf
    • http://ketofup.broughtoncambridgeshire.com/uploads/1/3/1/0/131070161/6f98cda034324ba.pdf
    • http://zemeparuv.omahabeadaffair.com/uploads/1/3/1/8/131871726/vonizuxoremevupuni.pdf
    • http://files.wwmscounseling.com/uploads/1/3/0/7/130776575/aef8f66.pdf
    • http://voketul.taylordesignarchitects.com/uploads/1/3/2/6/132681590/nejojewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/sivakawiganusavubofov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/calendario_completo_serie_a_19_20.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/xenokad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/xubozibefamozume.pdf
    • https://cdn.shopify.com/s/files/1/0444/2416/7591/files/jzyk_angielski_dla_gimnazjalisty._gramatyka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/for_dummies_collection_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/ipl_2020_timetable_and_venue_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/tusimabex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/55618113748.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/12929456576.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/waturemopurupazemu.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_off00006b45.bin
16804c2d339551b3c28451a9abf8233958e18547df1e619340026baaf479bb9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B45 5596 bytes
font_01_sfnt_off00007e3c.bin
e7436cda920259a753b2961c3c3f1f9b2c7a7989545228b4b55e5458c062c77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 10420 bytes