Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd08ebb895ff609…

MALICIOUS

PDF

56.0 KB Created: 2020-08-30 02:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf666faed2e8780bdad9dd0bdafc35ee SHA-1: 584af2c235a776d9561e3e4e1304a7eb3003ed5d SHA-256: fbd08ebb895ff609a92e2f0c11237cd65b18b3cfd7cc304642123296e5e664b6
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free textbook download, which is a common social engineering tactic. The document body and heuristics indicate the primary goal is to redirect the user to external content, likely to initiate a further download or exploit. The presence of numerous links, many pointing to benign Shopify URLs, suggests an attempt to mask the malicious redirector within a larger link farm.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=chemistry+central+science+12th+edition+pdf+free+download
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/schwarzkopf_perfect_mousse_commercial.pdf
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/the_bishop_s_candlesticks_short_dialogues.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/buwuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5751/files/database_models.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/34651547809.pdf
    • https://static.usrfiles.com/ugd/69695d_7b778bf5136b4d21b2f8f867e6fe1ad5.pdf
    • https://cdn.shopify.com/s/files/1/0459/7265/2199/files/zobamatepelulupulenem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/chemistry_laboratory_safety_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/javascript_manual_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/kadudak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/gukubipuvizabigizet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/kappa_alpha_order_ritual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/centrales_solares.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_off000083fe.bin
5c2d0506f6a6174c28fe95a06efae46f0809d65f8d49149b98e32a90c864c307
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 5676 bytes
font_01_sfnt_off0000973c.bin
f068cd7cf42fcd53e0009c1788673e66ae2f0c2646000de48e69bc157b992318
pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 11100 bytes
font_02_sfnt_off0000bd4f.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4F 16036 bytes