Malicious PDF — malware analysis report

Static analysis result for SHA-256 384815d4d39ee47d…

MALICIOUS

PDF

32.9 KB Created: 2020-08-09 23:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d022bd546f78827900b78e27e8f51e57 SHA-1: f86ee91551686ecdd90304516ceb3a767ccee0e6 SHA-256: 384815d4d39ee47d53de08fd630e5415cd97909ebb3a8ec7264c98b166c5b32e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'effects of inflation in the philippines pdf' and a URL pointing to a redirector, suggesting a lure to malicious content. The ML classifier also strongly indicated maliciousness.

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=effects+of+inflation+in+the+philippines+pdf
    • http://malowudug.thegmleague.com/uploads/1/3/1/4/131438405/kideg-mesigi.pdf
    • http://files.boujeebbeauty.com/uploads/1/3/1/8/131857734/gufetina.pdf
    • http://files.centrepointecincinnati.com/uploads/1/3/1/4/131406413/e08b8.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/34058155505.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/zigikan.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/bacterial_virulence.pdf
    • https://cdn.shopify.com/s/files/1/0443/0928/2972/files/bayley_3_testi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/ketejubajiziborodupome.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/bistable_multivibrator_using_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/vuxipobedomumupaguzeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/54891507889.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/fifalum.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/75009505788.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/psychology_wade_and_tavris_11th_edition.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_off000045f0.bin
50bc6d7616c32776a7684b21f5446bbdd5deaf26a066eee64ee9301bd8ab0a0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x45F0 5104 bytes
font_01_sfnt_off00005759.bin
1a9f752d225924cc71b8e7c3d906ad71f96307b3a68f38f9aec85c071e642000
pdf-font-stream PDF embedded font (sfnt) at offset 0x5759 9184 bytes