Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ce2811dbe81da5…

MALICIOUS

PDF

46.5 KB Created: 2020-07-31 13:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123fd380c1ca49a8db5120a31b4e209b SHA-1: 1e30d43e922f0326245711ce307535ca36db60e8 SHA-256: 45ce2811dbe81da505c82bcf181b583fb4c195e43a7623f383ad45192fb3c55c
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'Breitling aerospace avantage manual pdf'. The presence of a large number of external PDF links, as indicated by 'PDF_SEO_LINK_FARM', further supports the attack pattern of using SEO techniques to distribute malicious content or phish users. The ML classifier strongly supports the malicious nature of this PDF.

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=breitling+aerospace+avantage+manual+pdf
    • http://files.wordupinc.org/uploads/1/3/1/0/131070112/3549703.pdf
    • http://files.nealyibclc.com/uploads/1/3/0/8/130814586/posewu.pdf
    • http://files.kodeklix.com.au/uploads/1/3/2/7/132712040/1703497.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/94688459293.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/10673619248.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/17076316482.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/zugefumuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/jikaperuwebomipolepele.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/luvimutugifoboxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/22339702613.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/44143699247.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/272951478.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/69099016071.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/kimurupavudi.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_off00007721.bin
f472cf352a22f9c2d921fa86754141affd2124dd9276401ce52ef8389e8d13b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7721 5468 bytes
font_01_sfnt_off000089a6.bin
8c69242125dba7ad690a2e34e96e797854bd4e14795644a9a0b7aac255fb6da0
pdf-font-stream PDF embedded font (sfnt) at offset 0x89A6 10248 bytes