Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b9d40a31848dc6…

MALICIOUS

PDF

47.5 KB Created: 2020-08-19 04:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2397defb3227d7b2a0013a326a3b9bf SHA-1: d4c6aa83a707ba2c6fbdfff4255c7edba96838a4 SHA-256: e8b9d40a31848dc64430cd9f2c4f00c94f6844dfc9cb8c6026aba2927e3a4885
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://ttraff.cc/pify. The document body, though heavily obfuscated, contains text related to a 'Christmas party flyer template' and the malicious URL, suggesting a lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=christmas+party+flyer+template+free+word
    • http://files.reusable-shopping-bags.com/uploads/1/3/1/4/131452942/a370228c0b251.pdf
    • http://nugixalos.coastalphotoclub.com/uploads/1/3/1/3/131383478/125916.pdf
    • http://files.superstarbooks.com/uploads/1/3/1/4/131452840/vazisosiwe-kuxabu-sejinaxowe-wabeputikulonik.pdf
    • http://pejodasu.freeurnsforveterans.org/uploads/1/3/1/8/131856827/vazetokov-wazeba-mivuw-girigunijuva.pdf
    • http://files.ronthomaswriter.com/uploads/1/3/1/6/131606331/d5c55031070223c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/medidas_dela_cancha_de_basquetbol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/93878776594.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/pifabajefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/a_dozen_a_day_book_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/bofiminugegusizasoja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/puloguvikuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0663/9779/files/early_transcendentals_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/ninolufowiseg.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/xekapebodeseviv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/paslode_framing_nailer_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/zomavoweluk.pdf
    • https://cdn.shopify.com/s/files/1/0448/1217/3463/files/bag_sewing_patterns_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/pinoxugenevuwidadaba.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_off00005f09.bin
9945abd28ebcaa119fc345ce6925de41688a2faaefa22ba648bb647eafcbbda7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 5380 bytes
font_01_sfnt_off00007149.bin
08b865a6f8b4b1cbc55ecee6e3a3ca58d1c1e0398e1938df9f19639461cac13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 13324 bytes
font_02_sfnt_off00009b55.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B55 16060 bytes

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