Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73f4808e073a6ca…

MALICIOUS

PDF

40.1 KB Created: 2020-08-02 22:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24540bfb83712bf07dbf25604e9d619f SHA-1: dd9ede90f9fc0356cedcca7f271c02340cf61c09 SHA-256: c73f4808e073a6ca86d9c3f65a4ad14c3cfb595d247d0da31cb125ebf71cbfbf
130 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=sams+photofact+pdf', which is likely used to redirect users to a phishing or malware distribution site. The document body contains garbled text but includes the same malicious URL, reinforcing its role in the attack. No scripts were extracted, limiting the analysis to the PDF's linking structure.

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/pify?keyword=sams+photofact+pdf
    • http://files.michaeldietze.net/uploads/1/3/1/3/131381109/xepiwi.pdf
    • http://files.donthesitate.org/uploads/1/3/1/3/131383838/jewojevasixase-wobidikudomap-bajomizet-fiwogemus.pdf
    • http://files.deltasurveillance.com/uploads/1/3/1/4/131452800/loxutomo.pdf
    • http://files.dallasadpi.org/uploads/1/3/2/3/132303007/pilamodekapigigowopo.pdf
    • http://files.themerchantsguildstore.com/uploads/1/3/1/0/131070911/13f7d.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/62992855331.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/norfork_lake_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/ruwegivufedudadotopibara.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/55562267612.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/gevoxadogisopepesabizak.pdf
    • https://cdn.shopify.com/s/files/1/0428/6539/3820/files/72955683436.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/68367141015.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/18777912005.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/makikuset.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/vafofufidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/zojefeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/goxizimimamo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/53623847247.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d84.bin
1f922ccc86c3c9d2acd4a76560c5d5408fe0012aa48956d3d2656033ee2bc9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 5372 bytes
font_01_sfnt_off00006fae.bin
1742bb94acebc67c46ae35fd2e641c9085790a95c0b1e9be59bae53d1d1de559
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 10724 bytes