Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b3a166c925ec73…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 15:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ed646a5f774fe72f4fffe39f471c855 SHA-1: 6f437923b5855dc1abda931f337fe690410a26cf SHA-256: d7b3a166c925ec738bc2ad6f4348d6d2c264eeb8e9378af36660848e6dd6a14a
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to artificially boost search engine rankings or distribute multiple malicious links. The document body, though heavily corrupted, contains fragments of the URL and keywords related to 'dinamalar tamil news paper free pdf', indicating a lure for users seeking free content. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

Heuristics 3

  • 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.
  • 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=dinamalar+tamil+news+paper+free++pdf
    • http://nivomolak.ellanstudios.com/uploads/1/3/1/4/131408791/tikeguk-tubodipavepe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/siwagufaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/33849487142.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0413/files/german_books_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/82631149101.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/76330834364.pdf
    • https://cdn.shopify.com/s/files/1/0462/2139/4073/files/52922108145.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/wood_glue.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/distinction_between_criminal_law_and_civil_law.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/ncert_biology_class_11_morphology_of_flowering_plants.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/cordon_umbilical_funciones_y_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/petojomelidadu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/dejekemenis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/fofifozikogifa.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_off000057cc.bin
128cd891817eb6a148fdf7fe17b1f07ea4b5d35d59ad8b7c0a328e88f655f392
pdf-font-stream PDF embedded font (sfnt) at offset 0x57CC 4956 bytes
font_01_sfnt_off00006892.bin
bde7df9e86ce1046cb86b10b89bbff9d0822db4f0ff24e7a5afa24063960bf16
pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 9836 bytes
font_02_sfnt_off00008a29.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 4324 bytes