Malicious PDF — malware analysis report

Static analysis result for SHA-256 98470b584098f038…

MALICIOUS

PDF

62.3 KB Created: 2020-08-12 10:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecec69c17bbb0d1d00b42bbbd6202425 SHA-1: 6ca99501d79c1bba60c132e9705b5929271b38ed SHA-256: 98470b584098f03811df6c91c280c82edad389d801ae5fe19b3c5d44bc7fb0bc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to financial regulations ('Difference between basel ii and basel iii pdf'). The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack. No scripts were extracted from this sample.

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=difference+between+basel+ii+and+basel+iii+pdf
    • http://mafewo.falafelcafe.com/uploads/1/3/1/6/131607712/3480292.pdf
    • http://files.topviewleadership.com/uploads/1/3/1/6/131636808/garum.pdf
    • http://files.icbst.org/uploads/1/3/0/7/130739544/gilumuvaxab_gepexem_lepejifikene.pdf
    • http://files.homeopathhealer.com/uploads/1/3/1/3/131380847/nijagitapati_tukotosizivu_fewebar.pdf
    • http://files.edgeshowcase.com/uploads/1/3/0/7/130775195/rokikefiperupup-vowimogepasaxi-xotejupit-begalog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/11742296975.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/55597229298.pdf
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/rododimogopakoxevibil.pdf
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/murdar3_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2362/files/62630115440.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/lobular_carcinoma_in_situ_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/7739/3815/files/22930923875.pdf
    • https://cdn.shopify.com/s/files/1/0452/2328/0800/files/hysterectomy_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/jejetavesowof.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_off0000b517.bin
be40616ac6a42bab5831f815e4f6f503fe918ce5da3a270a8ccd7ae3388129fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB517 5380 bytes
font_01_sfnt_off0000c781.bin
94e631c222d60fb77b8d1783ffe80bd86804b672e8916985c77f9cdf437cc899
pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 10848 bytes