Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd548ba31c139d3…

MALICIOUS

PDF

78.0 KB Created: 2020-08-23 08:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f08fe1f1b90a6d585dc0c3d27750b46a SHA-1: 43aeb3afb70bd991d9cfb535ecd24337da8a0a3f SHA-256: 2dd548ba31c139d3f5c1c9e5411d02462179f87f30205b62465a6f024404d359
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous links to external PDFs hosted on various domains, many of which are dynamically generated or use generic paths, indicates a link farm or SEO poisoning tactic to distribute the malicious content.

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.cc/pify?keyword=concave+mirror+and+convex+mirror+worksheet
    • http://lolovi.gr8tjob.com/uploads/1/3/1/4/131407558/xazib.pdf
    • http://xupujewa.spiritwickcandleco.com/uploads/1/3/2/6/132681464/xevatovogamim.pdf
    • http://files.darksidegym.com/uploads/1/3/0/8/130873880/70b795.pdf
    • http://files.conniecycling.com/uploads/1/3/1/6/131606407/218844.pdf
    • http://files.jacksonproofreadingservices.com/uploads/1/3/0/8/130814258/xerafojunevexit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/csr_fibre_cement_sheet_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/gedafidupesakabifuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/exemple_attestation_de_travaille.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/3705268563.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/jewibumuxanegedaroz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/68935796616.pdf
    • https://cdn.shopify.com/s/files/1/0450/7402/2550/files/abbyy_transformer_plus_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/86671610857.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/41500177160.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/
    • https://cdn.shopify.com/s/files/1/0431/5

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de13.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 2828 bytes
font_01_sfnt_off0000e80e.bin
a2983b7019c46eada619f279d62021435f2660b0d57e64622706713b1749b2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 5240 bytes
font_02_sfnt_off0000f9c1.bin
ee7d9119b8a42512b3f0d5bf96cb0b0655a5804c5351a78e4bd2c7be8b917a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 9932 bytes
font_03_sfnt_off00011b9d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 4324 bytes

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