Malicious PDF — malware analysis report

Static analysis result for SHA-256 552656939ce5ab64…

MALICIOUS

PDF

65.4 KB Created: 2020-08-22 09:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34477da2c792fb5402547bd64f06885f SHA-1: 5eb873885af6cc373e0cd307256aa9d926589f72 SHA-256: 552656939ce5ab64bb1ce6d5775172f232fbc4c006dca3592479f8d082973564
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, with a query parameter suggesting a lure related to 'Arma 3 maps'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, also contains the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination.

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=arma+3+maps
    • http://nuluwage.ktrpo.com/uploads/1/3/0/8/130874493/wixof.pdf
    • http://files.thegardenchild.com/uploads/1/3/0/7/130775429/9163916.pdf
    • http://mogudu.oceanairandsaltyhair.co.uk/uploads/1/3/2/6/132681946/zedubumidatazep_naveta_xafifabifi_bapubutaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/60977931537.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/24405919759.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/72703627056.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/22524262442.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/fubewuror.pdf
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/rewakuwobika.pdf
    • https://cdn.shopify.com/s/files/1/0453/5035/5099/files/casting_process_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/gesture_app_lock.pdf
    • https://cdn.shopify.com/s/files/1/0428/7863/2095/files/97669590200.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/amadou_hampat_bah.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/bixeropukozideli.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/befojizedisubexe.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_off0000ba06.bin
4bc8356d7997561b99e3b14fe5dab624630aba4687e2c5b86c0b845f2a93eac2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 5088 bytes
font_01_sfnt_off0000cb31.bin
c5af0ffea6482e1fbfbfc6c0098b570030d2cb8a265ace1c493d80630072ef05
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB31 14476 bytes