Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97976bdef57ae27…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 18:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69ec70e8d5dbe5638dc160fb5a20237 SHA-1: ff35030c03c55a466a0e5cc5dd1a12d3db5606ac SHA-256: a97976bdef57ae270936d7ea799f722c5aa79c93776dd9778bc7fd78e9bdef0b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text suggesting it is a manual for 'Ableton live 9 manuale ita' and includes the malicious URL. This indicates a phishing or social engineering attempt to redirect the user to malicious content.

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=ableton+live+9+manuale+ita
    • http://files.clairethurlow.com/uploads/1/3/0/8/130873944/1075307.pdf
    • http://lajaboze.thecoastaldisplay.com/uploads/1/3/1/4/131406427/6604626.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/6_virtues_and_24_character_strengths.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/ppk_to_pem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/kunafezakatogetoronedun.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/adobe_scan_scanner_ocr_apk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/batodezukugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/napebidorefamilozupar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/67111689247.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/kikiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/ragutipimogiluf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/sovebape.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005760.bin
d35b8e2dd7752a33719a93b4726227ffe034ba623b00410ebe045b000dc93557
pdf-font-stream PDF embedded font (sfnt) at offset 0x5760 4784 bytes
font_01_sfnt_off0000678d.bin
23e6abdac772f84d7265793046c00771d5e084773f67101440b88990237a9c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 10376 bytes
font_02_sfnt_off00008afb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 4324 bytes