Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd03ef0007d204d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-22 09:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59b581ec84ea815be4a79e10810ab0c SHA-1: d25fb0ca2b71b15842423b710292d5f21b8cabe1 SHA-256: fcd03ef0007d204da4ea074f16110748460b5714f02f7cdaf130cffb46842e65
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Solarwinds network performance monitor datasheet' and includes the malicious URL. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm designed to improve search engine ranking for malicious lures.

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.ru/pify?keyword=solarwinds+network+performance+monitor+datasheet
    • http://files.numinousjane.com/uploads/1/3/2/6/132681409/b75e6438cfd52.pdf
    • http://files.pinnaclephysics.com/uploads/1/3/2/3/132302993/kebesidinofa-dobirovuz-mozoxorenajivuv.pdf
    • http://ludilol.carlhlam.com/uploads/1/3/1/4/131453134/womotezub.pdf
    • http://baduxemod.southbayreikiandwellness.com/uploads/1/3/1/1/131164239/pirilijutu_rezos_nijifebebad.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/gevow.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1356/files/membrane_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/27212372149.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/74571863061.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/74557233757.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/97495921348.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/cerebral_malaria_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/jidaponokapus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/angular_7_format_input_date.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0459/9231/2991/files/xidesoxinasu.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_off00005dec.bin
e1ac3468cfc52acca8f5460f1f57f95c064db375b71c472e0d0a3a5be7ba941c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 5656 bytes
font_01_sfnt_off0000710a.bin
ca0fb464acc1069beed92bc8a2d5f0f3799a17ff876cae2388f7a2a849676f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 10508 bytes