Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc5eafd7da467a4…

MALICIOUS

PDF

45.6 KB Created: 2020-08-11 19:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d62a31b002d5239e665a54417c6cace SHA-1: a620c7cc756cf8c5fe6e0b2e9ec7e769ac3ac85d SHA-256: fbc5eafd7da467a4955a85e4c9fe84670db4608d64a6f40991edb81e148ce970
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=arbosana+olive+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect users to 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.com/pify?keyword=arbosana+olive+pdf
    • http://files.fischerandcardamone.com/uploads/1/3/0/8/130815664/sadupusotijefi_kavupibevexiw.pdf
    • http://files.carolinevandeneynden.com/uploads/1/3/1/3/131379042/6343823.pdf
    • http://files.travelinproductions.com/uploads/1/3/2/7/132741211/5265911.pdf
    • http://files.longrangeacademy.com/uploads/1/3/1/1/131163976/7636111.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/jazinakokopakifuwidabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/bevamobimelitipugesu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/kemawupeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/bozowukidakewasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/15102493907.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/28416585326.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/all_quiet_on_the_western_front_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/84094859087.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/87872922587.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/pijegitejipowetafir.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/hernia_inguinalis_lateralis.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_off0000671c.bin
3d402b964833d270c40e09cdb24edaa6c025a998068e16b52c9809bfb947be3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 4932 bytes
font_01_sfnt_off000077de.bin
a9c23f5c907b8e58dafd6d628548f1691bd9fdd51efa60ea2a97f4a4bf9ff0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 10548 bytes
font_02_sfnt_off00009bf1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF1 4324 bytes

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