Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d3e7135423dfdc…

MALICIOUS

PDF

60.8 KB Created: 2020-08-08 10:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 311cca385585545f90ad60280b1c5536 SHA-1: ca9dc229e95e47c11e10efc85b33e9d46d940537 SHA-256: d7d3e7135423dfdc63f4f09eb397753aff5e48f45a9ef03d2b9e969ef5f12beb
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain (ttraff.com), as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Baby boy name list in tamil pdf' and the malicious URL, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent of redirecting users to external sites.

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=baby+boy+name+list+in+tamil+pdf
    • http://files.area59district47aa.org/uploads/1/3/0/8/130813898/jumus_dafabadagebif.pdf
    • http://files.lunkerhunters.org/uploads/1/3/0/7/130739043/duzanedowega.pdf
    • http://files.barrvillemc.org/uploads/1/3/0/7/130776118/423244.pdf
    • http://vafitew.codenamepandey.com/uploads/1/3/2/6/132695569/886326.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/mofenugapemet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/79993718931.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/zofapidaxetovavodubot.pdf
    • https://cdn.shopify.com/s/files/1/0440/1790/9910/files/asu_setup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/nodokinekimu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3462/1590/files/16910975312.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/16960391527.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/14485526196.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/mosutijom.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/brian_tracy_self_discipline.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/tagalunezugejavakuwi.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
stream_005_off0000969e.bin
2adae43965efdf9e803db5fc0449794ba6920220301da21bacbc37d837453245		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x969E 13296 bytes
font_00_sfnt_off0000845c.bin
a37c6b07e6db9ea02fe35239e7674c19dd0db3ff03db0d7e2fd88c09bc155352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 5380 bytes
font_02_sfnt_off0000b89c.bin
3773a5dd9337e58162d6aa54a1e2e32fbd26273e7cf2dface1cb6b2d72e11533		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89C 14568 bytes

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