Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e248a5d1e6a34b…

MALICIOUS

PDF

53.0 KB Created: 2020-08-06 21:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2c9d78542a85a5772c1e8c25d665a2d SHA-1: 1fe7d76d75a1f5719e2b0ebe7bce1a27be2120cc SHA-256: 80e248a5d1e6a34bb6f10caff1c7057390ef88ba455c30ce4550c7800b0da713
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector URL suggests an attempt to lure users to harmful content, likely for phishing or malware distribution.

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=adverbial+phrase+pdf
    • http://files.pjcareyarchitecture.com/uploads/1/3/0/8/130874435/ginevavenurikar_kibukunukonejaz_susimapomepisat.pdf
    • http://files.northernbeachescleanupcrew.com/uploads/1/3/0/7/130739450/1b928af2.pdf
    • http://files.fourthgradestingrays.com/uploads/1/3/0/7/130740049/7449715.pdf
    • http://files.manupagainstbullying.org/uploads/1/3/1/6/131637302/6605148.pdf
    • http://xevegi.kelseysq.com/uploads/1/3/1/3/131380042/2396577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/desoxuzabebunemamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/top_100_songs_of_1978.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/simixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/zozalalon.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/godusulerusovufana.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/nuvokumulogimejune.pdf
    • https://cdn.shopify.com/s/files/1/0435/4267/5608/files/mysql_command.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/handbook_of_big_data_technologies.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/nuvodanos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092ab.bin
93c4842277ca78a68ef0fd03d6e01593de0d19caca202d6006ab736e65c4732d
pdf-font-stream PDF embedded font (sfnt) at offset 0x92AB 5320 bytes
font_01_sfnt_off0000a4ba.bin
e0b97968b50d4cd1c28f6398d10747f0acfaef3946096fe300ddaf7c5bccd1cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4BA 10176 bytes